Level 2
SOLVED PAPERS 3 years (2012 -2014)
INSTANT
7
Copyright © 2014 Science Olympiad Foundation. Printed with the permision of Science Olympiad Foundation. No part of
this publication may be reproduced, transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the copyright holder. Ownership of an ebook does not give the possessor the ebook copyright. All disputes subject to Delhi jurisdiction only.
Disclaimer : The information in this book is to give you the path to success but it does not guarantee 100% success as the strategy is completely dependent on its execution. And it is based on last years papers of NSO exam.
Published by : MTG Learning Media (P) Ltd. Corporate Office : Plot 99, 2nd Floor, Sector 44 Institutional Area, Gurgaon, Haryana. Phone : 0124 - 4951200 Web: mtg.in Email:
[email protected] Regd. Office : 406, Taj Apt., Ring Road, Near Safdarjung Hospital, New Delhi-110029
Visit
www.mtg.in for buying books online.
MTG Work-Books / olympiad books CLASS 1
International Mathematics Olympiad
National Science Olympiad
International English Olympiad
MTG CSS Series
CLASS 2
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
International English Olympiad
MTG CSS Series
International English Olympiad
MTG CSS Series
CLASS 3
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
MTG Work-Books / olympiad books CLASS 4
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
International English Olympiad
MTG CSS Series
International English Olympiad
MTG CSS Series
International English Olympiad
MTG CSS Series
CLASS 5
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
CLASS 6
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
MTG Work-Books / olympiad books CLASS 7
National Science Olympiad
International Mathematics Olympiad
National Cyber Olympiad
Science IQ Challenge
Math IQ Challenge
International English Olympiad
MTG CSS Series
Master Mental Ability in 30 Days
CLASS 8
International Mathematics Olympiad
National Science Olympiad
National Cyber Olympiad
International English Olympiad
MTG CSS Series
Math IQ Challenge
Science IQ Challenge
Psychology of Success
The Secrets of SUCCESS
Master Mental Ability in 30 Days
MTG Work-Books / olympiad books CLASS 9
International Mathematics Olympiad
Math IQ Challenge
National Science Olympiad
Science IQ Challenge
National Cyber Olympiad
Psychology of Success
The Secrets of SUCCESS
International English Olympiad
Master Mental Ability in 30 Days
CLASS 10
International Mathematics Olympiad
Math IQ Challenge
National Science Olympiad
Science IQ Challenge
National Cyber Olympiad
Psychology of Success
The Secrets of SUCCESS
International English Olympiad
Master Mental Ability in 30 Days
MTG Work-Books / olympiad books CLASS 11
International Mathematics Olympiad
Math IQ Challenge
Science IQ Challenge
National Science Olympiad
Psychology of Success
National Cyber Olympiad
The Secrets of SUCCESS
Master Mental Ability in 30 Days
CLASS 12
International Mathematics Olympiad
Math IQ Challenge
Science IQ Challenge
National Science Olympiad
Psychology of Success
National Cyber Olympiad
The Secrets of SUCCESS
Master Mental Ability in 30 Days
Class
1 to 10
JEE Main & Advamced | AIPMT | BOARDS | OLYMPIAD | NTSE
FOUNDATION COURSE For Classes 8, 9 & 10 Class 8
Class 9
Class 10
IMPORTANT INSTRUCTIONS Changes in the Mode and Pattern in SOF Level 2 Exams for year 2014- 2015 Exam Date : 7th and 8th February 2015. Kindly coordinate with your school coordinator for exact date and center for exam. Write to
[email protected] for any query related to it. Mode of exam : NCO/ NSO/ IMO Level 2 for the academic year 2014-15 will be an Online Test Pattern of the exams : National Cyber Olympiad Class 3 to 4
5 to 12
Section
No. of Questions Marks per Question
Computers & IT Achievers Section Grand Total Computers & IT Achievers Section Grand Total
30 5 35 45 5 50
1 2 1 3
Total Marks 30 10 40 45 15 60
NATIONAL SCIENCE OLYMPIAD Class 3 to 4
5 to 10
11 and 12
Section
No. of Questions Marks per Question
Science Achievers Section Grand Total Science Achievers Section Grand Total Physics & Chemistry Achievers Section Mathematics/Biology Grand Total
30 5 35 45 5 50 25 5 20 50
1 2 1 3 1 3 1
Total Marks 30 10 40 45 15 60 25 15 20 60
International Mathematics Olympiad Class 3 to 4
5 to 12
Section Mathematics Achievers Section Grand Total Mathematics Achievers Section Grand Total
No. of Questions Marks per Question 30 5 35 45 5 50
1 2 1 3
Total Marks 30 10 40 45 15 60
14th
LEVEL - 2 Year 2011-12
2
| 14th NSO | Level-II | Class 7
MENTAL ABILITY +
+
= 82,
+
+
= 47,
+
= 64. Then
=?
1.
If
(A) 17
2.
What are the common factors of 60 and 120? (A) 2, 3, 4, 6, 10, 12, 15, 20, 30, 45, 60 (C) 2, 3, 4, 5, 10, 12, 15, 20, 30, 40, 60
3.
Find the missing number in the adjoining number pattern. (A) 9769 (B) 9794 (C) 8976 (D) 7986
4.
Twenty per cent of Anuj's annual salary is equal to seventy-five per cent of Raj's annual salary.
(B) 18
(C) 35
(D) 53
(B) 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 (D) 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 40 ? 158 62 4 16 10 2 6 3 2
Raj's monthly salary is sixty percent of Ravi's monthly salary. If Ravi's annual salary is ` 1.44 lacs,
what is Anuj's monthly salary? (A) ` 2,70,000 (B) ` 27,000
5.
Letters of a word given below have been jumbled up. You are required to construct the word. Each
(C) ` 3,24,000
(D) ` 5,400
letter has been numbered and the word is followed by four options. Choose the option which gives the correct order of the letters as indicated by the numbers to form the word.
E
T
1 2 (A) 2, 1, 6, 5, 3, 4 (B) 3, 1, 4, 5, 6, 2
C 3
K
O
P
4 5 6 (C) 6, 4, 1, 2, 3, 5
(D) 6, 5, 3, 4, 1, 2
6.
If ‘+’ stands for ‘×’, ‘–’ for ‘÷’, × for ‘–’ and ‘÷’ for ‘+’, find the value of 26 + 74 – 4 × 5 (A) 220 (B) 376 (C) 478 (D) 488
7.
Select a suitable figure from the options which will continue the same series established by the five problem figures.
(A)
(B)
8.
Which of the following pairs of triangles are not congruent by ASA condition?
(C)
cm 6.1
(B) B
C P
30°
B
60°
Q
C
° 40
R
° 50
A
O
cm
B
°
45
45°
(D)
A
6.1
(A)
(C)
D
A
D
C
A
P
(D) B
45°
5 cm
55°
C
Q
60°
5 cm
30°
R
÷ 2.
3 Find the value of x.
(A) 120°
(B) 130°
(C) 150°
(D) 115°
A
35 °
9.
14th NSO | Level-II | Class 7 |
D x
B
50°
45°
C
10. A hall is 36 m long and 24 m broad allowing 80 m2 for doors and windows. The cost of papering
the walls at ` 8.40 per m2 is ` 9408. The height of the hall is ______. (A) 12 m (B) 5 m (C) 10 m
(D) 8 m
11. Observe the data given below. 19, 25, 59, 48, 35, 31, 30, 32, 51
If 25 is replaced by 52, what will be the new median? (A) 25 (B) 35 (C) 48
12. Simplify (A) 3
23 × 3 4 × 4 3 × 32
(B) 32
(D) 32
(C) 33
(D) 3–3
13. If x : y = 8 : 9, find the ratio of (7x – 4y) : (3x + 2y) (A) 10 : 21 (B) 21 : 15 (C) 8 : 10
(D) 21 : 10
14. Choose the Venn diagram which best illustrates the three given classes : "Yak, Zebra, Deer"
(A)
(B)
(C)
(D)
15. At the end of a business conference all the ten people present shake hands with each other once.
How many handshakes will there be altogether? (A) 20 (B) 45
(C) 55
(D) 90
SCIENCE 16. When the two terminals of a cell are connected directly with a wire, then _____. (A) More electrical energy is stored in the cell (B) The chemicals get used up very fast (C) No current flows (D) The cell explodes 17.
In the given diagram, where will you find the image of the pencil? (A) A (B) B (C) C (D) D
18. Which of the following properties of light are made use of in the periscope shown here ?
(i) Light travels very fast.
(ii) Light can be reflected.
(iii) Light travels in a straight line. (A) (i) and (ii) (B) (i) and (iii)
Object
mirror
periscope
(C) (ii) and (iii)
(D) (i), (ii) and (iii)
4
| 14th NSO | Level-II | Class 7
19. Match the two columns and select the correct option. Column I Column II (a) Smallest planet (i) Mars (b) Hottest planet (ii) Mercury (c) Planet having rings (iii) Uranus (d) Planet also called red planet (iv) Venus (A) a-(ii), b-(iv), c-(iii), d-(i) (B) a-(i), b-(ii), c-(iv), d-(iii) (C) a-(iii), b-(iv), c-(i), d-(ii) (D) a-(iv), b-(i), c-(ii), d-(iii) 20. Rina puts a magnet near object L. The south pole of the magnet attracts both parts J and K of object L magnet the object L. Which of the following statements are true ?
1.
Object L is made of steel.
2.
Object L is made of copper.
3.
The north pole of the magnet will attract part J of object L.
4. The north pole of the magnet will attract part K of object L. (A) 1 and 3 (B) 2 and 4 (C) 1, 3 and 4
N
21. Study the diagram carefully.
Electrical energy
Kinetic energy
S
J
K
(D) 2, 3 and 4
Heat energy
Sound energy The diagram does not show energy conversion in an _____. (A) Electric drill (B) Electric blender (C) Electric iron (D) Electric hair dryer
22. Train M travels with a speed of 80 km/h from Hyderabad to Bangalore. Train N travels from Hyderabad
to Bangalore with a speed of 75 km/h. Which of the following statements is true ? (A) Trains M and N have different speeds and different velocities. (B) Trains M and N have same velocity but different speeds. (C) Trains M and N have the same velocity as they are travelling in the same direction. (D) Trains M and N have same speed and different velocities .
23.
Which of the following is correct? (A) A cyclone is formed by a very high pressure system with very high speed winds revolving around it. (B) In summer the winds flow from the land towards the ocean. (C) In winter the winds flow from the land to the ocean. (D) The coastline of India is not vulnerable to cyclones.
24. Read the statements carefully and mark the correct option. Statement 1 : Specific heat capacity is the cause of formation of land and sea breeze. Statement 2 : The specific heat of water is more than land. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true and statement 2 is false. (D) Both statements 1 and 2 are false. 25. A compass is often used to indicate direction. Which one of the following is not true about the
compass needle? (A) It is made from steel. (C) It must be freely suspended in order to work.
26.
Group of neutral substances is (A) Common salt solution, mustard oil, oxygen, carbon dioxide (B) Sugar solution, apple juice, oxygen, nitrogen (C) Glucose solution, kerosene, petrol, oxygen (D) Salt solution, mustard oil, lime water, nitrogen
(B) It always points in the east-west direction. (D) It is a magnetised object.
5
14th NSO | Level-II | Class 7 |
27. Give the common names of the following.
Sodium chloride (NaCl), Sodium hydroxide (NaOH), Sodium carbonate (Na2CO3), Sodium bicarbonate
(NaHCO3) and Potash alum. (A) Common salt, caustic soda, washing soda, phitkari, baking soda (B) Common salt, baking soda, caustic soda, washing soda, phitkari (C) Common salt, washing soda, caustic soda, baking soda, phitkari (D) Common salt, caustic soda, washing soda, baking soda, phitkari
28. Observe the given figure carefully. What conclusion could you draw regarding compound injected inside the skin, solution used for relief and (A) (B) (C) (D)
the process ? Injected Lactic acid Formic acid Sodium hydroxide Baking soda
Used for relief Calamine solution Calamine solution Hydrochloric acid Hydrochloric acid
Process Neutralisation Neutralisation Neutralisation Acidification
29. A beaker of ice was left in the open for 10 minutes. Which one of the following statements is true
when the ice melts? (A) The ice loses heat when it melts. (B) The ice gains heat when it changes to water and steam. (C) The ice loses heat to the surrounding and changes its state. (D) The ice gains heat from the surrounding and changes its state.
30. Match Column I with Column II and select the correct option from the codes given below. (a) (b) (c) (d) (A) (C)
Column I Vinegar (i) Milk of magnesia (ii) Sugar solution (iii) Gudhal petals (iv) (a) - (ii), (b) - (i), (c) - (iv), (d) - (iii) (a) - (ii), (b) - (i), (c) - (iii), (d) - (iv)
Column II Neutral Acidic Indicator Basic (B) (a) - (ii), (b) - (iv), (c) - (i), (d) - (iii) (D) (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)
31. Vinegar and baking soda are mixed together in a test-tube and a setup is prepared to pass the evolved gas through lime water as shown in the given figure. Lime water turns milky after passing gas X through it. Identify gas X.
(A) O2
(B) SO2
(C) H2
(D) CO2
32. Read the following chart carefully.
Which of the following paths do not show characteristics of bases? (A) (ii), (iii) and (iv) (B) (ii), (v) and (vi) (C) (ii), (v) and (vii)
(D) (v), (vi) and (vii)
| 14th NSO | Level-II | Class 7
6
33. Neha used the given apparatus to conduct an experiment. She noticed that the cork popped out
of the bottle. This shows that (A) Water expands on heating (B) Air expands and moves up on heating (C) Water moves inside the bottle on heating (D) Cork contracted on heating
34. Examine the given experiment. Why has rise in temperature occurred ?
(A) Because of reproduction.
(B) Because of photosynthesis.
(C) Because of excretion.
(D) Because of respiration.
35.
Which of the following characteristics of polar bear are not adaptations to cold climate ? (i) White fur (ii) Thick fur (iii) Sharp teeth and claws (iv) Fat under the skin (v) Wide and large paws (A) (i) & (ii) (B) (i) & (iv) (C) (ii) & (iv) (D) (iii) & (v)
36. What is X in the given Venn diagram ?
(A) Disposal of water
(B) Storage of water
(C) Conservation of water
(D) Run-off water
37. How did the water get inside the potato cavity ? (A) Water moves from an area of more water molecules to an area of less water molecules. (B) Water moves from an area of less water molecules to an area of more water molecules. (C) Sugar moves outside and water moves inside the potato. (D) Water moves outside and sugar moves inside the potato. 38. Take a plant with thick stem. Remove the phloem tissue as shown in the figure. Observe the stem after a few days. The stem shows swelling in the upper portion.
This is due to (A) Upward movement of food getting blocked (B) Downward movement of food getting blocked (C) Upward movement of water getting blocked (D) Downward movement of water getting blocked
39. The given figure shows a type of vegetative plant propagation that gives rise to new plants. What
is it (A) (B) (C) (D)
called ? Climber Runner Tendril Bulbil
7
14th NSO | Level-II | Class 7 |
40. In insects, exchange of gases takes place through _____. (A) Spiracles (B) Stomata (C) Bronchi
(D) Alveoli
41. The given figure represents the stomach of ruminants with its four chambers labelled as P, Q, R and S. Which chambers allow grazing animals like sheep, cattle etc. to efficiently digest cellulose,
a common carbohydrate in plants and how ? (A) P, Q, S; these chambers secrete cellulase enzyme. (B) P and Q; these chambers contain billions of bacteria that digest cellulose. (C) R and S; these chambers contain billions of bacteria that digest cellulose. (D) P and Q; these chambers secrete cellulase enzyme.
42. Anusha puts some freshly cut plant twigs in a beaker filled with water. She covered the plant with a funnel and test tube as shown in the given figure and then put the setup in sunlight. After few hours, she observes that bubbles are evolving in the setup. Which
of the following is correct regarding the air bubbles ? (A) Bubbles evolve as carbon dioxide is released in plant respiration. (B) Bubbles evolve because water gets heated under sunlight. (C) Bubbles evolve as oxygen is released in photosynthesis. (D) Both (A) & (B)
43.
What is the basis of the given pairing ? (A) Occurrence in the same place. (B) Resemblance in external features. (C) Similar food resources. (D) Similarity in the mode of nutrition.
44. Refer the given figure of a flower with labelled parts P, Q, R and S.
Which of the following is incorrect regarding floral part and its function ? (A) S – Protects floral parts. (B) P – Place of fusion of male and female gametes. (C) Q – Produces thousands of pollen grains. (D) R – Attracts the pollinators.
45. Read the given statements. (i) In stomach, hydrochloric acid kills ________ and helps the enzyme ________ to work. (ii) ________ is the common chamber where wind pipe and food pipe open, but ________ closes the wind pipe when we swallow food. (iii) _____ are used for tearing food, while ______ help in grinding food. Select the option that correctly fills the blanks in any two of the above statements. (A) (i)-Parasites, Ptyalin ; (iii)-Premolars, Canines (B) (ii)-Pharynx, Epiglottis ; (iii)-Canines, Molars (C) (i)-Bacteria, Pepsin ; (ii)-Oesophagus, Epiglottis (D) (i)-Parasites, Pepsin ; (iii)-Canines, Incisors 46. Anita gets a home assignment to prepare a file of fabrics made up of different fibres. She takes a piece of fabric and burns it to identify the fibre. It burns with a smell of burning plastic. What
does this show ? (A) Fabric is made up of cotton. (C) Fabric is made up of pure wool.
(B) Fabric is made up of an expensive material. (D) Fabric is made up of synthetic fibres.
8
| 14th NSO | Level-II | Class 7
47. Match Column I with Column II and select the correct option from the codes given below. Column I Column II (a) Shearing (i) Cleaning fabric (b) Weaving (ii) Synthetic material (c) Scouring (iii) Angora goat (d) Sericulture (iv) Changing fibre to yarn (e) Acrylic (v) Removing fleece (f) Mohair (vi) Raising silkworms (g) Spinning (vii) Changing yarn to fabric (A) a-(v), b-(vii), c-(i), d-(vi), e-(ii), f-(iii), g-(iv) (B) a-(v), b-(i), c-(iii), d-(vi), e-(ii), f-(iv), g-(vii) (C) a-(v), b-(vii), c-(vi), d-(i), e-(ii), f-(iv), g-(iii) (D) a-(vii), b-(v), c-(i), d-(vi), e-(ii), f-(iii), g-(iv) 48.
Read the given statements and select the correct option. Statement 1 : Water present in rocks expands when it freezes and breaks the rock. Statement 2 : Temperature plays an important role in rock weathering. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true and statement 2 is false. (D) Both statements 1 and 2 are false.
49. Identify the soil types X, Y and Z from the given table and X (A) Sandy soil (B) Clayey soil (C) Clayey soil (D) Sandy soil
select the correct option. Y Z Loamy soil Clayey soil Sandy soil Loamy soil Loamy soil Sandy soil Clayey soil Loamy soil
50. Refer the given figure of tropical forest. Which of the following is incorrect regarding X and Y ?
(A) X shows relatively more photosynthesis.
(B) Y receives lower amount of rainfall.
(C) Y consists of shrubs and layer of ferns, mosses and herbs.
(D) Y receives abundant sunlight.
SPACE FOR ROUGH WORK
15th
LEVEL - 2 Year 2012-13
2
| 15th NSO | Level-II | Class 7
MENTAL ABILITY 1.
What fraction of the given figure is shaded ?
7 16 9 (C) 16
1 2 17 (D) 32
(A)
(B)
9 of the boys are primary pupils. 14
2.
There are 80 members in a Science Club. 70% of them are boys.
How many primary boys are there in the Science Club? (A) 26 (B) 36 (C) 46
3.
Indu placed some paper flowers in a straight line as shown. How far is the 7th flower from the
1st flower ? (A) 28.8 m (B) 22.2 m (C) 24 m (D) 23.1 m
4.
5.
(D) 56
The ratio of the number of Mohit's stamps to Anuj's is 8 : 5. The ratio of the number of Anuj's stamps to Samit's is 2 : 3. They have 328 stamps altogether. How many more stamps does Mohit have than Samit ? (A) 15
(B) 12
(C) 8
In the given figure (not drawn to scale), AB is parallel to CD and ∠ECD is a right angle. Find ∠y. (A) 111° (B) 112° (C) 113° (D) 114°
6.
Find the value of
(A) 2
7.
In the given figure (not drawn to scale), ABCD is a trapezium with
AB parallel to DC, AC = AD and EAC is a straight line. Find ∠y. (A) 75° (B) 77° (C) 78° (D) 79°
8.
How many faces does the solid have ? (A) 8 (B) 9 (C) 12 (D) 14
9.
Nikki's father is five times as old as Nikki. 8 years later, Nikki will be
is the present age of Nikki's father ? (A) 32 years (B) 40 years
n+1
2n +4 − 2 2n 2 2n +3
(D) 14
+ 2−3.
9 n − 2 (B) (C) 0 8
(C) 20 years
(D) 1
1 as old as her father. What 3 (D) 5 years
3
15th NSO | Level-II | Class 7 |
10. The given table shows the marks obtained by Sushant in two examinations. Subject
First Term
Mid Term
English
84
82
Mathematics
90
94
Science
78
85
Hindi
76
?
The maximum marks for each subject is 100. If Sushant's average mark in First Term was 2.5 marks
less than in Mid Term, how many more marks did he score for Hindi in Mid Term than in First Term ? (A) 12 (B) 1 (C) 13 (D) 4
11. Grass is to be laid in a rectangular plot 15 m long and 13 m wide leaving two triangular sections at opposite edges for two flower beds. If the flower beds are to be equal right-angle isosceles triangles with equal sides measuring 1.5 m each, find out how much would it cost to lay grass at ` 8 per sq. m ? (A) ` 1542 (B) ` 1462 (C) ` 1264 (D) ` 1642 12. In how much time would the simple interest on a certain sum be 0.125 times the principal at
10% per annum ? 1 (A) 1 years 4
(B) 1
3 years 4
(C) 2
1 years 4
(D) 2
3 years 4
13. If OA = 7 cm, then find the area of the shaded part of the given figure.
(A) (B) (C) (D)
90 77 77 90
m2 m2 cm2 cm2
14. Amongst P, Q, T, R and S, each having a different height, T is taller than P and S but shorter than
R and Q. P is not the shortest. Who amongst them is the tallest ? (A) R (B) Q (C) P
(D) R or Q
15. In the following list of numerals, how many 2's are followed by 1's but not preceded by 4 ?
(A) 2
4 2 1 2 1 4 2 1 1 2 4 4 4 1 2 2 1 2 1 4 4 2 1 4 2 1 2 1 2 4 1 4 2 1 2 4 1 4 6 (B) 3 (C) 4 (D) 5
Science 16. Beena obtains a blurred image of an object on a screen by using a concave mirror. In order to
obtain a sharp image on the screen, she will have to shift the mirror _______. (A) Towards the screen (B) Away from the screen (C) Either towards or away from the screen depending upon the position of the object (D) To a position very far away from the screen
17. A bus is moving on a straight road. The speed time graph for the
motion of the bus is shown in figure. Find the distance travelled by
the bus in 4 seconds.
(A) 100 m
(B) 200 m
(C) 300 m
(D) 400 m
| 15th NSO | Level-II | Class 7
4
18. Low atmospheric pressure exists on the earth in which of the following latitudes? (A) At the equator only (B) At 30° N and S (C) At the poles (D) At the equator and at 60° N and S. 19. A metal rod is shaped into a ring with a small gap. If this is heated, which of the following will
not (A) (C) (D)
occur? The length of the rod will increase. (B) The gap will decrease. The gap will increase. The diameter of the ring will increase in the same ratio as the length of the rod.
20. Which one of the following statements is false? (A) The electric current leaving the positive terminal of a battery is the same as the current returning to the negative terminal. (B) A battery supplies the same current to any object to which it is connected. (C) A conductor in which an electric current is flowing has an electric field in its interior. (D) The electric current flows in a direction opposite to the motion of the electrons. 21. Read the following statements and mark the correct option.
Statement 1 : On the earth, summer occurs when the earth is closest to the sun and winter occurs, when the earth is farthest from the sun.
Statement 2 : The earth is a satellite of the sun. (A) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is correct but statement 2 is incorrect. (D) Both statements 1 and 2 are incorrect.
22. Why do people feel cool if they do not dry themselves after swimming in the sea? (A) Water evaporates and causes cooling. (B) Water insulates them from the warm air. (C) Water is a good conductor of heat. (D) Water is colder than the air. 23. A truck takes 20 s to travel the first 80 m, and another 10 s to travel a further 70 m. What is the average speed of the truck? (A) 0.20 m s–1 (B) 2.3 m s–1 (C) 4.0 m s–1 (D) 5.0 m s–1 24. Four identical light bulbs are shown in figure. What happens if
bulb A fails , so that it cannot conduct? (A) Both bulbs B and D will glow. (B) Only bulb C will glow. (C) Only bulb D will glow. (D) Both bulbs C and D will glow.
25. When a horse pulls a cart, the force that helps the horse to move forward is the force exerted by
________. (A) The cart on the horse (C) The ground on the cart
(B) The ground on the horse (D) The horse on the ground
26. Niranjan collected soil samples from two different fields-1 and 2 which have poor fertility. He collected the following information about the two fields.
l
Excessive use of chemical fertilisers in field-1.
l
Soil solution of field-2 turns colour of phenolphthalein to pink.
Suggest the soil treatment of the two fields for better crop yield. (A) Slaked lime for both the fields (B) Organic matter for both the fields (C) Slaked lime for field-1 and organic matter for field-2 (D) Organic matter for field-1 and slaked lime for field-2
5 27.
Study the following changes : (i) Fireworks exploding (iii) Melting butter for popcorn (v) Curdling of milk Choose the correct statements. (A) (iii) and (v) are physical changes. (C) (i), (ii) and (v) are chemical changes.
15th NSO | Level-II | Class 7 | (ii) Drawing copper into a wire (iv) Expansion of metals
(B) (ii), (iii) and (iv) are physical changes. (D) (iii), (iv) and (v) are chemical changes.
28. Which of the following are neutralisation reactions?
1.
2NaOH + H2 SO4
3.
Ca(OH)2 + 2NH4 Cl
5. NaOH + HNO3 (A) 1 and 2
Na2 SO4 + 2H2 O CaCl2 + 2H2 O + 2NH3 NaNO3 + H2 O (B) 1, 2 and 5
2. 4.
H2 SO4 + 2NH4 OH MnO2 + 4HCl
(C) 3 and 4
(NH4)2 SO4 + 2H2 O MnCl2 + 2H2 O + Cl2 (D) All of them
29. Gases which are released into the air as pollutants dissolve in rain drops to form acids. Which of the following makes the rain acidic?
1. Sulphuric acid (A) 1 and 2
2. Nitric acid (B) 1, 2 and 3
3. Carbonic acid (C) 2 and 4
4. Hydrochloric acid (D) 1, 2 and 4
30.
Choose the incorrect statement among the following. (A) Vinegar is used to cure wasp stings because vinegar can neutralise the stings. (B) Bacteria in our mouth change the sugar left on our teeth into bases which cause the decay of teeth. (C) Antacids contain weak alkalis, which can neutralise the excess acid in our stomach. (D) Baking soda is added to milk which neutralises the lactic acid in milk to prevent curdling of milk.
31. To investigate the conditions for rusting, following experiment was performed. Test tube Q Test tube P Test tube R Test tube S
Oil
Boiled distilled water Clean nails
Cotton Boiled distilled water
Anhydrous calcium chloride
Sodium chloride solution
In which test tube, nails rusted most heavily and what inference can be drawn from it? (A) Test tube P, water is needed for rusting. (B) Test tube Q, air is needed for rusting. (C) Test tube R, boiled water increases the rusting speed. (D) Test tube S, presence of sodium chloride increases the rusting speed.
32. Match the columns and mark the correct option.
Reactions
(P) Magnesium oxide + Water
(Q) Vinegar + Baking soda
(R) Copper sulphate solution + Iron
(S) Iron + Oxygen + Water (A) (P)–(I); (Q)–(IV); (R)–(II); (S)–(III) (C) (P)–(II); (Q)–(III); (R)–(I); (S)–(IV)
Identification of the product(s) formed
(I) Turns lime water milky
(II) Forms a film of brownish substance
(III) Turns red litmus blue (IV) Solution turns green with brownish deposits (B) (P)–(III); (Q)–(I); (R)–(IV); (S)–(II) (D) (P)–(IV); (Q)–(II); (R)–(III); (S)–(I)
| 15th NSO | Level-II | Class 7
6
33. A solution P is added to another solution Q to form a salt R and water with the evolution of heat. Solution Q turns methyl orange to red and an indicator S to colourless. Identify solution P and
indicator S respectively. (A) Vinegar, Litmus solution (C) Spinach juice, Litmus solution
(B) Curd, Phenolphthalein (D) Window cleaner, Phenolphthalein
34. Refer the given diagram that shows nutritional interactions among two organisms (P and R), atmosphere (Q), and lithosphere (S). Identify the two organisms and select the correct option. P R (A) Neem Mistletoe
(B) Cuscuta
Mango
(C) Pitcher plant
Insects
(D) Mushroom
Wood logs
35. Which of the following pairs possess similar mode of nutrition? (A) Lizard - Venus flytrap (B) Mosquito - Cuscuta (C) Vulture - Mushroom (D) All of these 36. Which of the following options correctly identifies X and Y in the given Venn diagram that represents a plant structure?
(A) (B) (C) (D)
X X X X
-
Root, Y - Root hair Leaf, Y - Leaf cell Stem, Y - Xylem Leaf, Y - Phloem
37. Riya's father has undergone surgical removal of gall bladder due to some complications. Now, he
will (A) (B) (C) (D)
not be able to digest _______. Proteins efficiently because pepsin will not be produced. Fats efficiently because bile will not be produced. Carbohydrates efficiently because HCl that activates amylase function will not be produced. None of these
38. Two organisms X and Y were kept in complete isolation in a well planted garden within two separate cages. They were regularly provided with water but not with food. Organism X flourished well but
the (A) (B) (C) (D)
organism Y died. Organism Y was a Organism X was a Organism Y was a Organism X was a
What could be the most suitable explanation for this ? saprophyte and it cannot get dead organic matter to feed upon. bird parasite and could feed upon the birds living on trees. carnivore and it cannot get its prey animal to feed upon. herbivore and could feed upon the dead organic matter present in soil.
39. Saurabh burned two different fibres X and Y in order to identify them. X smelt like burning paper while Y smelt like burning hair. Which of the following options correctly identifies the two fibres? X (A) Wool (B) Cotton (C) Cotton (D) Silk
Y Silk Rayon Silk Wool
7
15th NSO | Level-II | Class 7 |
40. The given box shows some animal adaptations. Which of the following options correctly classifies these adaptations in accordance to desert and cold habitats?
(A) (B) (C)
Desert habitat (i), (ii), (iii) (i), (iii), (iv) (i), (ii), (iv)
(D) (ii), (iii), (iv)
Cold habitat (i), (ii), (iv) (ii), (iii), (iv) (i), (ii), (iii)
(i), (iii), (iv)
41. Which of the following is not a function of forests ? (A) Act as climate control factor (B) Prevention of global warming (C) Flood control and desertification (D) None of these 42. Given below is the conversation of three friends Ritu, Jaya and Sudhir.
Ritu : I live at the place with longest daylight period and high average day temperature. Jaya : I have been to an interesting place where there is 6 months of day and 6 months of night. Sudhir : I live at the place which receives sun rays vertically.
Which of the following statements is incorrect in context of the conversation?
[Refer the given figure of Earth showing positions X, Y and Z] (A) Ritu lives at the place Y. (B) Jaya has been either to place X or to place Z. (C) Sudhir lives at the place Z. (D) Both (B) and (C).
43. Gaurav is participating in pottery activity in school. The composition of the soil best suited for the activity may be represented as ________.
(A)
(C)
(B)
(D)
44. Which diagram shows the path of oxygen and carbon dioxide during respiration in a fish? Oxygen
(A)
(B) Carbon dioxide
45.
Oxygen Carbon dioxide Oxygen
(C)
Oxygen
(D)
Carbon dioxide
Carbon dioxide
During the process of inhalation in human beings _________. (A) Diaphragm contracts but external intercoastal muscles and lungs expand. (B) Diaphragm expands but external intercoastal muscles and lungs contract. (C) Diaphragm and external intercoastal muscles expand but lungs contract. (D) Diaphragm and external intercoastal muscles contract but lungs expand.
46. Which of the following groups contains plants which share the same kind of vegetative
propagules? (A) Ginger, Onion, Dahlia (C) Onion, Turmeric, Ginger
(B) Dahlia, Bryophyllum, Sweet potato (D) Sweet potato, Dahlia, Potato
8
| 15th NSO | Level-II | Class 7
47. The given graph shows measurements of different types of blood vessels. Select the correct option regarding these vessels.
(A) Blood vessels of type X always carry oxygenated blood.
(B) Blood vessels of type Y always carry deoxygenated blood.
(C) Z represents a capillary which are very thin walled blood vessels.
(D) All of these
48. Megha conducted an experiment with plants and prepared three set-ups as shown in the figure. Which of the three beakers will show the maximum decrease in water level?
(A) Set-up P, because layer of oil increases evaporation.
(B) Set-up R, because it will lose water by both transpiration and evaporation.
(C) Set-up Q, because it will lose water by both transpiration and evaporation.
(D) Set-ups R and Q will show same level of decrease because both of them lose water by transpiration.
49. The given figures show a longitudinal section of a flower and a fruit. Which of the following incorrectly matches the floral part to the fruit part it develops into? Floral part Fruit part (A) P Z (B) T W (C) R Y (D) S X
50. Read the given statements and select the correct option.
Statement 1 : Plants and animals both are essential for each other's survival.
Statement 2 : Animals complete the process of nutrient recycling thus maintain soil nutrients. (A) Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is correct but statement 2 is incorrect. (D) Both statements 1 and 2 are incorrect. SPACE FOR ROUGH WORK
16th
LEVEL - 2 Year 2013-14
16th NSO | Class-7 | Level 2
2
Mental Ability 1.
2.
If '+' means '–', '–' means '×', '×' means '÷', and '÷' means '+', then find the value of 14 × 3 ÷ 11 – 3 + 101? – A. 63.3 – B. – 63.3 C. 63.48 D. 63.3 In the following question two rows of numbers are given. The resultant number in each row is to be worked out separately based on the following rules and the question below the numbers is to be answered. The operations of rows of numbers progress from left to right. (i)
(ii)
(iii)
(iv)
(v)
If a two-digit odd number is followed by a twodigit odd number they are to be added. If a two-digit even number is followed by a twodigit odd number which is a perfect square, the even number is to be subtracted from the odd number. If a three-digit number is followed by a two-digit number the first number is to be divided by the second number. If a prime number is followed by an even number the two are to be added. If an even number is followed by another even number the two are to be multiplied.
16 8 32 132 11 X2 If X is the resultant of the first row, what is the resultant of the second row?
A. B. C. D.
192 128 132 144
3.
Which of the following statements are true and which are false?
(i)
An equilateral triangle has rotational symmetry of order 3 about the point of intersection of its altitudes. (ii) A square has rotational symmetry of order 4 about a vertex. (iii) has reflection symmetry about a line but no rotational symmetry about a point. (i) (ii) (iii) A. True False True B. False True False C. False True True D. True True False
) × (6 ) (−2) 27 (3 × 8 ) 3
2
4
− 23
4.
Simplify:
A.
128 27
B.
4096
C.
128 9
D.
4096 3
5.
A woman is seven times as old as her son. After 5 years, she will be four times as old as her son. What are the present ages of the mother and son respectively?
A. B. C. D.
6.
Find the area and the perimeter of the given figure (not drawn to scale) in which every corner is right angled and the dimensions are in centimetres.
A. B. C. D.
7.
Evaluate x and y in the given figure.
A. B. C. D.
8.
Find the value of
Rules:
(
362 23 × 242
35 42 38 32
years, years, years, years,
cm2 , cm2 , cm2 , cm2 ,
144 108 256 108
x x x x
3
= = = =
5, 5, 9, 6,
A.
15 127
B.
18 127
C.
15 129
D.
17 127
80 78 44 88
= = = =
4 2
years years years years
cm cm cm cm
2 6 3 4
5 4 1 3 2 of + 1 ÷ + × 5 8 7 5 7 12.5 + 7.5 − ( −3.5) + 8.25
2
y y y y
5 8 8 4
2
3 8
16th NSO | Class-7 | Level 2
9.
3
In the following figure, the smaller triangle represents the teachers; the big triangle represents the politicians; the circle represents the non-graduates and the rectangle represents members of Panchayat. Different regions are being represented by the letters of English alphabet.
12. Which of the following statements is incorrect with respect to Rational Numbers?
A.
A rational number can be expressed in the form p q , where p and q are integers and q ≠ 0.
B.
C.
D.
The number 0 is neither a positive nor a negative rational number. There are infinite rational numbers between two rational numbers. All rational numbers are integers.
13. If a sum of money amounts to ` 2200 in 5 years and 3 the interest is of the principal, find the rate of interest and the 8principal.
Who among the following members of Panchayat is a non-graduate as well as a teacher?
A.
A. B. C. D.
B.
C.
D.
G F CC H
10. Find the missing character in the given figure matrix, if the matrix follows certain trend row-wise or column-wise.
A. B. C. D.
18 24 36 58
7 9 21 27 4 2 36 18 9 4 54 ?
11. A seller would make a profit of 12% by selling a lunch box at ` 392. At what price should he sell it to make a profit of 15%?
A. B. C. D.
` ` ` `
402.50 502.80 432.70 532
1 5 %, 2 7 3 %, 2 1 7 %, 2 3 5 %, 2
` 1800 ` 1900 ` 1600 ` 2000
14. Find the HCF of 784, 1232 and 1960.
A. B. C. D.
11 56 63 12
15. Vicky walked 15 metres towards North, took a left turn and walked 20 metres, and again took a left turn and walked 15 metres and stopped walking. Towards which direction was he facing when he stopped walking?
A. B. C. D.
South West North North-West
SCIENCE 16. When water is heated from 0°C to 10°C, its volume _________.
A. B. C. D.
Increases Decreases Does not change First decreases and then increases.
17. Which of the following form virtual and erect image for all positions of a self luminous object?
A. B. C. D.
Convex lens Concave lens Convex mirror Concave mirror
18. The diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness. A third lamp Z is connected in parallel with lamp X. What happens to the brightness of lamp Y?
A. B. C. D.
Brighter than normal Normal Dimmer than normal Very dim (cannot be seen).
16th NSO | Class-7 | Level 2
4
19. A car travels from one place to another in 2 hours. Its speed-time graph during this motion is shown in figure. The maximum acceleration during this journey is _________.
A. B. C. D.
140 160 100 120
km/h2 km/h2 km/h2 km/h2
20. Ten million electrons pass from point P to point Q in one micro second. The current and its direction is
A. B. C. D.
1.6 3.2 1.6 3.2
× × × ×
10–14 A from point P to point Q 10–6 A from point P to point Q 10–6 A from point Q to point P 10–9 A from point Q to point P.
21. An athlete completes half round of a circular track of radius R, then the displacement and distance covered by the athlete are, respectively _________.
A. B. C. D.
2R and pR pR and 2R R and 2pR 2pR and R.
22. A sphere, a cube and a thin circular plate, all of same material and same mass are heated at same high temperature, then
A. B. C. D.
Plate will cool fastest and cube the slowest Sphere will cool fastest and cube the slowest Plate will cool fastest and sphere the slowest Cube will cool fastest and plate the slowest.
23. A drunkard is walking along a straight road. He takes 5 steps forward and 3 steps backward and so on. Each step is 1 m long and takes 1 s. There is a pit on the road 11 m away from the starting point. The drunkard will fall into the pit after
A. B. C. D.
21 29 31 37
s s s s.
24. A concave mirror is used to form a real image of a candle. If the upper half of the mirror is covered by a piece of paper, then
A. B. C. D.
The image becomes dimmer The image becomes brighter The image remains same Both A and B
25. Smita applied turmeric paste on thin stripes of a paper. After drying she put few drops of given sample solutions on these strips. What are the changes in the colour she observes?
(i) (ii) (iii) (iv) A. B. C. D.
Amla juice Lime water Common salt solution Baking soda solution (i)-Yellow, (ii)-Red, (iii)-Yellow, (iv)-Red (i)-Red, (ii)-Yellow, (iii)-Yellow, (iv)-Red (i)-Red, (ii)-Red, (iii)-Yellow, (iv)-Yellow (i)-Yellow, (ii)-Yellow, (iii)-Red, (iv)-Red
26. Rachit added a teaspoonful of vinegar and a pinch of baking soda in a test tube. He heard a hissing sound and saw bubbles of a gas coming out. He passed this gas through lime water. Which of the following is incorrect about his experiment ?
A. B. C.
D.
Lime water turns milky. The gas evolved was carbon dioxide. Sodium hydrogencarbonate is formed which makes lime water milky. Both B and C
27. Kriti performed the following two experiments.
I.
She held a hack-saw blade with a pair of tongs and then kept the tip of the free end on the flame. She observed that the blade became red hot. II. She dropped a shaving blade into the blue coloured copper sulphate solution. The colour of the solution changed to green. Identify the types of changes occurring in both the experiments. A. I - Physical change, II - Chemical change B. I - Chemical change, II - Physical change C. Both I and II - Physical changes D. Both I and II - Chemical changes
28. The rain becomes acidic because W, sulphur dioxide and X dissolve in rain drops to form Y, Z and nitric acid respectively. W turns lime water milky. Identify W, X, Y and Z respectively.
A.
B.
C.
D.
Carbon monoxide, Nitrogen, Calcium hydroxide, Sulphur Carbon monoxide, Nitrogen oxide, Carbon dioxide, Sulphuric acid Carbon dioxide, Nitrogen dioxide, Carbonic acid, Sulphuric acid Carbon dioxide, Nitrogen oxide, Calcium hydroxide, Sulphur.
16th NSO | Class-7 | Level 2
5
29. Raghav wrote two statements on board.
1.
Indigestion is caused by too much of acid in the stomach. Taking spinach juice will relieve the indigestion.
2.
If the soil is basic, quick lime or slaked lime is added which neutralises the basicity of the soil.
Choose the correct option about the statements.
A. B. C. D.
Statement 1 is correct but 2 is incorrect. Statement 2 is correct but 1 is incorrect. Both statements are incorrect. Both statements are correct.
30. Which of the following is a different type of change than the others?
A.
B.
C.
D.
Nimit leaves a piece of bread in the toaster for too long. The bread becomes black and kitchen fills with smoke. Madhu forgot to dry the bread knife after washing. Reddish brown spots appeared on it. Renu kept few naphthalene balls in her almirah. After few days, the balls disappeared from the almirah. A plant collects sunlight and prepare food by photosynthesis.
31. Among the following, choose the properties which are not physical properties.
1. 3. 5. 7. A. B. C. D.
33. The given figure shows steps involved in the process of wool yarn making. Identify steps a, b, c, d and e and select correct option regarding them:
Flexibility Solubility Melting point Neutralisation 1, 3, 5, and 6 2, 4 and 7 3, 4, 6 and 7 3, 5 and 7
A.
B.
C.
D.
Megha conducted an experiment to find out the requirements for photosynthesis. She subjected the plants to different conditions as shown in the table below. Study the table and use it to answer questions 34 and 35.
2. Flammability 4. Combustion 5. Conductivity
32. Tanu caught three different types of organisms, X, Y and Z, and put them into two containers. X and Y were placed in container 1 and X and Z were placed in container 2. The graphs below show the changes in the number of organisms X, Y and Z over time.
In many parts of the world, step ‘a’ is done once a year. It harms the sheep and is painful. Steps ‘b and c’ show the process of scouring, during which workers are at high risk of getting respiratory diseases. Step ‘d’ converts wool fleece into narrow untwisted fibres called slivers. Step ‘e’ depends on the length of the fibres. Long fibres are used for making tweeds and flannel whereas short fibres are used in making gabardines.
Set-up A
Water
Carbon dioxide
Sunlight
B
C
D
E
F
G
34. Which set-ups are used by Megha to conduct the experiment?
A. B. C. D.
B, E and F only C, D and G only A, B, E and F only A, C, D and G only
35. Which of the following variables should be kept constant to conduct a fair test? Which one of the following food chains is correct?
A. B. C. D.
Z → X → Y X→Y→Z Y→Z→X X→Z→Y
(i) (iii) A. B. C. D.
Type of plant Size of pot (i) and (ii) only (ii) and (iv) only (i), (ii) and (ii) only All of the above
(ii) Amount of soil (iv) Type of soil
16th NSO | Class-7 | Level 2
6
36. The given table shows the relative volumes of blood flowing through different organs at rest and during exercise. Organ
At rest
d e f g
1.0 1.0 1.0 1.0
During light exercise 1.1 0.8 3.8 1.6
During heavy exercise 1.1 0.5 11.0 2.5
Identify organs d, e, f and g and select the correct option.
A. B. C. D.
d d d d
-
Kidneys, e - Heart, Brain, e - Kidneys, Heart, e - Muscles, Brain, e - Kidneys,
f f f f
-
Muscles, g - Brain Muscles, g - Heart Kidneys, g - Brain Heart, g - Muscles
37. A thick outer ring is removed from the trunk of a tree. Which of the following is likely to be observed after several days?
A.
B.
C.
D.
38. The given diagrams show the cross-section of two different flowers. Which statements about both flowers is/are true?
(a) (b) (c) A. B. C. D.
Both flowers can grow into fruits. Pollination can take place in both flowers. Both flowers have male and female parts. a only a and b b and c a and c
39. Select the mismatch from the following options.
A. B. C. D.
Sundew – symbiotic Cuscuta – Parasitic plant Nepenthes – insectivorous plant None of these
40. The breaking of rocks into smaller pieces over thousands of years is called weathering. What are the agents and factors that cause weathering of rocks?
A. B. C. D.
Wind and water Large variation in day and night temperatures Living things All of these
41. Which one of the following special characteristics of animals does not help them to survive?
A.
B.
C.
D.
Camels have long eyelashes to prevent sand from entering their eyes. Rhinoceroses keep their bodies cool by wallowing in mud. Desert foxes have large ears to help them lose heat easily. Kangaroo rats store fats in their humps which can be changed into water.
42. Shivam is measuring percolation rate of water through three different soils. He cuts off the top and bottom of a mineral water bottle to get a hollow plastic pipe and places the pipe in each soil sample so that it is 2-3 cm deep in the soil. He then pours 250 mL of water into the pipe and measures the time taken for the water to percolate completely into the soil. He calculated the percolation rates of soil samples as given below: Soil Samples Percolation Rate S1 15.5 mL/min S2 7.3 mL/min 1.4 mL/min S3 Which among the given soil samples is the most suitable for growing paddy crop and lentils respectively?
A. B. C. D.
S3 S1 S3 S2
and and and and
S 1 S2 S 2 S3
43. Read the following statements regarding waste-water treatment plant with one or two blanks. Select the option that correctly completes any two statements.
(i)
_____ process allows settling of sand in the chambers. (ii) The solid waste called _____settles down and lighter waste called _____ floats on the surface. (iii) Secondary treatment involves use of_______. (iv) _____ and _____ are used in tertiary treatment. A. (ii) sluge, scum; (iii) chemicals B. (iii) grit removal; (iv) chlorine, UV rays C. (ii) scum, sludge; (iii) bacteria D. (i) screening; (iv) aerobic, anaerobic bacteria
16th NSO | Class-7 | Level 2
7
44. Most life in a forest exists vertically in trees. The vertical part of a forest is divided into four layers as given below. Match their respective features and select the correct option. Column I Column II Overstorey (i) Termites, bacteria, earthworms and fungi (b) Canopy (ii) It receives the most sunlight (c) Understorey (iii) Humidity is very high (d) Forest floor (iv) The leaves of the trees have ‘drip tips’ A. a - (i), b - (iii), c - (iv), d - (ii) B. a - (ii), b - (iv), c - (i), d - (iii) C. a - (iv), b - (ii), c - (i), d - (iii) D. a - (ii), b - (iv), c - (iii), d - (i)
45. Study at the given classification chart. How are the following plants grouped?
(a)
A.
B. C. D.
Group X Flowers with both male and female parts Plants with flowers Plants without seeds Reproduction from underground stems
Group Y The male and female parts are on separate flowers Plants without flowers Plants with seeds Reproduction from seeds
ACHIEVERS SECTION 46. The diagram shows four similar cans. Each can contains the same volume of water initially at 80°C. After five minutes, which can will contain the coolest water ?
A.
B.
C.
Fill in the blanks using the above information. The colour of solution X + Phenolphthalein is p . When solution Y is added drop by drop with stirring, the q colour first appears. If one more drop of solution X is added, the solution becomes r . p q r A. Pink, Pink, Colourless B. Magenta, Pink, Colourless C. Pink, Colourless, Magenta D. Colourless, Pink, Colourless 48.
D.
47. Naina was given two test solutions X and Y.
X
: Turns China rose indicator to dark pink.
Y
: Found in wasp's sting.
She performed an experiment using the two solutions as shown in the figure.
Study the given classification chart of types of asexual reproduction and select the correct option regarding it.
A.
B.
C.
D.
Vegetative propagation is a type of asexual reproduction in which the stems, roots, leaves and buds give rise to new plants. Vegetative propagation should be placed in box ‘A’. Root is vegetative part of a plant through which runner, tuber, rhizome and bulb develop. It should be placed in box ‘E’. Budding gives rise to runner, tuber, rhizome and bulb. It should be placed in box ‘E’. None of these
16th NSO | Class-7 | Level 2
8
49. Read the given passage with a mistake and select the option that corrects it.
During the process of breathing (inhalation), the diaphragm muscles contract and be comes dome shaped. At the same time, intercostal muscles contract to pull the ribs upwards. This increases the volume of the chest cavity. Subsequently the volume of lungs increases. As the air pressure in the lungs decreases, air moves into the lungs through the air passage.
A.
B. C.
D.
The diaphragm muscles contract and become flat. This decreases the volume of the chest cavity. As the air pressure in the lungs increases, air moves into the lungs through the air passage. At the same time, intercostal muscles contract to pull the ribs downwards.
50. The given graph shows the amount of undigested food in the human digestive system over time.
(i)
Which part of the digestive system does point b to point c represent? (ii) Which component of food is broken from point a to point b? A. (i) - Stomach, (ii) - Protein B. (i) - Oesophagus, (ii) - Carbohydrate C. (i) - Oesophagus, (ii) - Fat D. (i) - Small intestine, (ii) - Glucose
SPACE FOR ROUGH WORK
ANSWER KEYS 14 th NSO 1. 8. 15. 22. 29. 36. 43. 50.
(D) (D) (B) (A) (D) (C) (D) (D)
2. 9. 16. 23. 30. 37. 44.
(B) (B) (B) (B) (B) (A) (C)
3. 10. 17. 24. 31. 38. 45.
(B) (C) (C) (B) (D) (B) (B)
4. 11. 18. 25. 32. 39. 46.
(B) (B) (C) (B) (B) (B) (D)
5. 12. 19. 26. 33. 40. 47.
(D) (C) (A) (C) (B) (A) (A)
6. 13. 20. 27. 34. 41. 48.
(C) (A) (C) (D) (D) (B) (A)
7. 14. 21. 28. 35. 42. 49.
(D) (C) (C) (B) (D) (C) (B)
(B) (A) (C) (C) (D) (C) (D)
6. 13. 20. 27. 34. 41. 48.
(D) (C) (B) (B) (C) (C) (C)
7. 14. 21. 28. 35. 42. 49.
(D) (D) (B) (B) (D) (C) (A)
(A) (D) (B) (C) (C) (D) (D)
6. 13. 20. 27. 34. 41. 48.
(B) (C) (C) (A) (D) (D) (A)
7. 14. 21. 28. 35. 42. 49.
(A) (B) (A) (C) (D) (C) (A)
15 th NSO 1. 8. 15. 22. 29. 36. 43. 50.
(B) (A) (C) (A) (B) (B) (D) (C)
2. 9. 16. 23. 30. 37. 44.
(B) (B) (C) (D) (B) (D) (C)
3. 10. 17. 24. 31. 38. 45.
(D) (B) (B) (B) (D) (C) (D)
4. 11. 18. 25. 32. 39. 46.
(C) (A) (A) (B) (B) (C) (C)
5. 12. 19. 26. 33. 40. 47.
16 th NSO 1. 8. 15. 22. 29. 36. 43. 50.
(B) (A) (A) (C) (C) (B) (C) (B)
2. 9. 16. 23. 30. 37. 44.
(A) (B) (D) (B) (C) (B) (D)
3. 10. 17. 24. 31. 38. 45.
(A) (B) (C) (C) (B) (B) (A)
4. 11. 18. 25. 32. 39. 46.
(D) (A) (A) (A) (A) (A) (B)
5. 12. 19. 26. 33. 40. 47.
